Transmission wont shift?

You need to scan for trouble codes, that will help pinpoint where to look for your problem.

These guides will help us fix it.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

and

https://www.2carpros.com/articles/automatic-transmission-problems

Please run down these guides and report back.

Recently the service light came on. I had the car serviced. The service light came on again and when increasing speed the transmission would not shift up as normal when the speed increases. The jeep dealer said I should replace the battery. The battery seems to be perfectly fine. This diagnosis does not seem to make sense. Can you help?

Don

Sadly you have some major tranny problems. It is a fact that the Catera has a Peugeot transmission and an Opel engine. It is most difficult to repair. You may be able to have the computer re-set but i doubt it will fix the problem. Big Bucks Good luck

Our jeeps check engine light came on and would not dowshift to first on a stop. It ran fine and shifted fine otherwise, we just had no first gear. My wife was not driving when it started, she started it and said the light came on. This makes me think that maybe it is a ensor related problem wha do you think?

You can try a self-diagnostic test. To activate self diagnostic program:

With the ignition switch in the OFF position, depress the TRIP and RESET buttons.
While holding the TRIP and RESET button turn the ignition switch to the ON position.
Continue to hold the TRIP and RESET buttons until the word CODE appears in the odometer windows (about five seconds ) then release the buttons. If a problem exists, the system will display Diagnostic Trouble Codes (DTC's). If no problem exists, the code 999 (End Test) will momentarily appear.
Post the results...

My '04 Jeep Grand Cherokee will not shift out of second gear. reverse is fine. Sometimes it starts out in 1st and wont shift. Sometimes it starts out in second and wont shift. I checked the transmission fluid and its ok.

Check engine light on? suspect trans in fail-safe mode possi ble internal fault or solenoid fault

No check engine light

will need to have trans scanned and pressure tested

My jeep limited 2003 has been working fine from when I bought it with 69,000 miles. Now at 85,000 miles my gears are all messed up and I know my transmission is messed up. I took it to a specialist he said I need to rebuild the transmission (almost all say that, to rip people off). I wanted to know if there is something else I can do.

When I drive the car, it kicks at around 30mph I am assuming it is not shifting gears right. When the specialist put it on the machine he said it has to do with my 4th gear clutch and he needs to rebuild the transmission at $1400. Does this sound right?

To shed a clarity on your paranoia....not to say you aren't partially correct...

Often when you go into a transmisison and need to replace part x, there are other parts that are also on the verge of failure...this is often the reason for the rebuild recommendation. IF he goes in and replaces part X and gets it back togather and the next weakest link goes immediatly...who should have to pay to go back in?

Were there any codes in the pcm?

transmission seems to double shift at 17mph otherwise have no problems could it be some sort of sensor going bad?

Transmission Problemms are a bear to a backyard mechanic, about all you can do is change fluid and filter. Sounds like your xmission is having a problem completing the shift from one gear to the next. When is the last time the fluid and filter WAS changed? Is your fuild level too low? Have you hit it with a sledgehammer yet?

When we put the jeep into reverse you can feel it engage but when you press the accellerator it goes no where. When it goes in drive, it will not shift out of 1st gear. You can drive in 2nd gear if you put the transmission in 2nd gear. Fluid is full and clear. What could be the issue? I don't want to hear from the repair shop it needs a new or rebuilt transmission. Thanks!

Hi there,

The first thing that i would do is get a scan done and check for any unresolved transmission electrical issues, do this first as this will give us a better idea as to what is going on.

mark (mhpautos)

My Jeep was running great, then one day I stopped at a light and when i accelerated again, it would not shift, the rpms just kept rising. i pulled over, went through the gears and when I went to the regular drive position the vehicle was starting out in 2 gear instead instead of first. then it started operating correctly for two days and check engine light even went out. Now its doing the same thing again. any idea what might be wrong? thanks chris

For starters have the PCM (computer) scanned for codes, Autozone will do it for free. If the PCM sees a problem it will store a code that will help in diagnosing the problem, get back with the exact codes

Thanks for your super quick response. I did as you suggested and the codes that were saved are: P 1762, P1757 The Jeep seems to be running perfect for the last 3 days. I'm a part changer. Is this something I can fix? Thanks again, Chris

Those are both governer pressure codes, not real sure if it will be a DIY project to fix.Will require some diagnostic with a meter and scanner to fix, the only possibility in the list that looks easy, is to try a trans service it could set codes due to excessive debris in th etrans pan. Try a service first

Can you fix transmissions? Both codes are for the governor and gov pressure...

I'll take it to a shop. Auto zone's print out for both codes said poss bad connection or open circuit, i was hoping maybe just a electrical plug had come loose. Why do you think it has been running good for the last few days? Thanks Chris

follow up to mhpautos answer to tommyb389 question
on 2/13/2011. Question was, 2002 Jeep Cherokee will not shift out of low gear. Will shift to 2nd gear @4,000rpm or 40 mph. I do have reverse.

Internmittent failure, these are the hardest to find.If it isnt acting up, the shop will test and all will be ok. Its actually better if it is acting up to have the shop check it then

I would still work through the diagnosis chart supplied in the first post, i feel that this is the most probable cause.

mark (mhpautos)

I go to take off in my jeep and can't even go 20 mph and it acts like it is in neutral and just revs up. If I turn if off and take off the battery terminals it will run fine

This sounds like a computer related issue. Have you scanned the computer to determine if there are any trouble codes related to the transmission? Have any warning lights come on? Is the fluid full and clean?

Transmission fluid is good. I have not hooked it up to a computer. Where would I go to do that?

I would like to say most parts stores will do it for free; however, they usually only have basic scanners that read engine codes only. You will most likely need to see a regular shop. You could call nationally recognized parts stores to see if they can do it. Please keep in mind, this could be other things too. There could be an issue with a shift solenoid, the governor, a clutch pack... The scan should identify if it is related to any of the electrical components that run the transmission. (I miss the old hydraulicly run transmissions. They were much easier to diagnose!)

I took it to an auto shop and they reset something and said that should of helped it but it didn't

2002 Cherokee will not shift out of low gear.
Fluid level ok, no smell. Replace TPC. Checked connections on sensors on or near transmission. Proper ohms at output sensor at rear of transmission. A tech furnished ohm value at that time.(3 weeks ago)

Do you have reverse? if so check chary below.

mark (mhpautos)

Do you remember what it was? Did they provide any information that could be helpful for me?

I can't remember what they called it. I think it was a sensor

That is what I was thinking, something electric. It could be a bad shift solenoid.

Transmission will not go into reverse gear when first started in the morning. Also when shifting into drive, it hangs in current gear until I let off the throttle slightly. After trans temp. warms up (5 miles or so), the trans begins to work fine with reverse but slightly rough shifts. Shudders if rapidly accelerated from standing stop.

Work performed:
Valve body replaced (improved shifting into reverse but RPMs need to be a little high and it is sluggish) sometimes it will jerk into reverse around 1300 RPM if it was just driven recently
Trans oil: Toyota DII (level is correct)
Solenoids checked (13 ohms)
There is a fault code in the output speed sensor circuit (P0720)
Disconnected TCM and tested: same results

Have you checked the transmission line pressure yet with a pressure gauge?I always do that before replacing anything.Also have tried to diagnose the P0720 yet?

Have not checked line pressure yet. The P0720 code may be coming from the wiring itself. Its been awhile since I checked but I think it was over the 5 ohms for any part of that circuit stated in the powertrain and diagnostics manual from jeep. The sensor, when checked with a multimeter, puts out a beep every time the rotor passes by it (am I correct in thinking its an induction type?). When I get some time, I plan to repair that wiring harness.

Which model cherokee do you have classic sport etc?Also what size engine do you have?

2001 Jeep Cherokee 60th Anniversary Edition. VIN puts it down as Sport. Engine is 4.0L 6 cyl 242 naturally aspirated.

I posted the trouble tree for code P0720 lets follow that trouboe tree and see what you find.I have seen output speed sensor issue cause transmission issues.